Re: [matplotlib-devel] TTF subsetting in PDF

[<jk...@ik...>]

"John Hunter" <jd...@gm...> writes:

> On 7/10/07, Michael Droettboom <md...@st...> wrote:
>
>> The comparison is just over the PDF files, old way (Truetype embedding)
>> vs. new way (Type 3 subsetting).
>
> This must be dominated by some weird outliers.  I'm seeing great
> results with the canonical "simple_plot"
>
> -rw-r--r--   1 johnh    research   19352 Jul 10 12:11 new.ps
> -rw-r--r--   1 johnh    research  144227 Jul 10 12:11 old.ps

Probably the difference is just that you are comparing PS files while
Michael was comparing PDF files, where the internal gzip compression
reduces the file size. Even in PDF files you can get large gains if you
use several different fonts (which can easily happen with math formulas)
or you have very big fonts (such as some fonts that come with Mac OS X).

I'm seeing a bug on OS X, whose file system is by default
case-preserving but not case-sensitive:

458  ->                 fontdictObject = self.embedTTF(
459                         filename, self.used_characters[filename])

Here self.used_characters has a key starting with '/Users/jks/...' but
filename is '/users/jks/...'. I'm not sure how to fix this cleanly. 
I though os.path.normcase would help, but it doesn't:

>>> normcase('/users'); normcase('/Users')
'/users'
'/Users'

> In any case, excellent work!

Yes, very good! This is a much-needed feature for the PS and PDF
backends.

-- 
Jouni K. Seppänen
http://www.iki.fi/jks